Original 1st printing 22&1/4 x 28&1/8" concert poster for blues legend Big Joe Williams appearing with the Conqueroo from 3/1-2/1968 and Shiva's Head Band appearing with the Rubayyat from 3/8-/19/1968, all shows held at the Vulcan Gas Company in Austin, TX. 

Art by Robert Rush, image is # 16 in the VGC/Vulcan Gas Company series. 

Medium-thick flat vellum stock poster is in good/decent (B to B/B-) condition; there is a 1&1/2 x 1/2" chunk of paper missing from the upper right corner tip, along with a small tape pull in the top center margin, a moderate amount of edge creasing/wear along the left/right margins, a 2" diagonal bend in the lower right corner, a light amount of handling/creasing, a few scattered pin-prick spots and tiny thin stress creases here and there and a bit of staining on the reverse, otherwise fine. 

Cool-looking early-'68 Vulcan poster with a great design.